Howlong,howmuchtime,howmanyhours多长时间,多少时间,几个小时?
Howoften是多么经常,多长时间发生一次.
help动词原形,
helpful形容词,有助的,
helped过去时,过去分词.Hehelpedmebefore.Hehasjusthelpedhismothercookdinner.
helps一般现在时,第三人称,动词原形后面加s.Hehelpshismothercookdinnereveryday.
请问helphelpfulhelpshelped这些什么意思呢?哪个用来形容同学呢?
某同学对你很有帮助:He(She)isveryhelpfultome(tootherpeople/tous).